A cooling device capable of receiving, cooling, and discharging a fluid-to-be-cooled, comprising:
- a plurality of heat exchangers arranged at different positions from each other in an up and down direction, each of the plurality of heat exchangers having a refrigerant container that stores a liquid refrigerant for cooling the fluid-to-be-cooled, and a plurality of heat exchanger core portions immersed in the liquid refrigerant in the refrigerant container, the plurality of heat exchanger core portions respectively permitting the fluid-to-be-cooled to flow for performing heat exchange with the liquid refrigerant;
- and
- a plurality of heat exchanger connection portions respectively forming a plurality of cooling flow passages for the fluid-to-be-cooled to pass through the plurality of heat exchangers in order by connecting the heat exchanger core portions to each other between the heat exchangers adjacent to each other among the plurality of heat exchangers,
- wherein each of the plurality of heat exchanger connection portions includes a receiving port connected to an uppermost heat exchanger serving as the heat exchanger positioned uppermost among the plurality of heat exchangers, the receiving port being for receiving the fluid-to-be-cooled into the cooling flow passage, and a discharging port connected to a lowermost heat exchanger serving as the heat exchanger positioned lowermost among the plurality of heat exchangers, the discharging port being for discharging the cooled fluid-to-be-cooled from the cooling flow passage,
- the plurality of cooling flow passages are disposed independently from each other at least from the uppermost heat exchanger to the lowermost heat exchanger,
- the plurality of heat exchangers are connected to each other along the up and down direction,
- the refrigerant container further has a side wall arranged on an upper side of a bottom wall and connected to the bottom wall, and an upper wall portion connected to an upper end portion of the side wall,
- the plurality of heat exchanger connection portions are respectively disposed to respectively pass through a bottom wall of a single heat exchanger among the plurality of heat exchangers and an upper wall portion of another heat exchanger arranged on a lower side of the single heat exchanger,
- each of the plurality of heat exchangers has a separation support portion arranged to partition an interior of the refrigerant container into an upper portion and a lower portion, the separation support portion supporting a mist separation portion, the separation support portion being for inhibiting a refrigerant gas and a refrigerant mist from passing through the separation support portion while permitting the plurality of heat exchanger connection portions to respectively pass through the separation support portion along the up and down direction, and
- each of the plurality of heat exchanger connection portions is disposed to extend in the up and down direction in the refrigerant container along the side wall of the heat exchanger until reaching the bottom wall of the heat exchanger from the upper wall portion of the heat exchanger via the separation support portion.